Briefly, this error occurs when Elasticsearch is unable to register a console handler due to the unavailability of Java Native Access (JNA). JNA is a library that provides Java programs easy access to native shared libraries. To resolve this issue, ensure that the JNA library is correctly installed and available in the classpath. If it’s not, you should install it. Also, check if there are any restrictions preventing Elasticsearch from accessing the JNA library. Lastly, ensure that the version of JNA is compatible with your Elasticsearch version.
This guide will help you check for common problems that cause the log ” cannot register console handler because JNA is not available ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: bootstrap, handler.
Log Context
Log “cannot register console handler because JNA is not available” classname is Natives.java.
We extracted the following from Elasticsearch source code for those seeking an in-depth context :
return JNANatives.getShortPathName(path);
}
static void addConsoleCtrlHandler(ConsoleCtrlHandler handler) {
if (JNA_AVAILABLE == false) {
logger.warn("cannot register console handler because JNA is not available");
return;
}
JNANatives.addConsoleCtrlHandler(handler);
}
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